Directory structure:

scicore/ contains all files concerning resource management and (de)compression,

engine/ contains the files directly related to the VM and the text parser, such
as heap and state management and handling for script and vocab resources.

graphics/ contains graphics and input management (since input handlers are
usually bundled with graphics libraries) and stuff for specific graphics/
input libs.

include/ contains all global header files.

sound/ contains sound management, both general and specific to certain
libraries/interfaces/daemons.

tools/ contains all 'tools' for working with SCI resource data.

win32/ contains the workspace and projects for Visual C++.